Some may lament the lack of ANC, but the CX 400T deliver where it counts: sound. With a similar audio performance to the premium Momentum TW2, they offer excellent audio at a more affordable price.

Excellent sound; Pretty comfortable to wear; Unassuming design

Volume limited; Slightly disappointing battery life

The Sennheiser CX 400BT earphones deliver some of the best on-ear controls and audio performance you'll find in a true wireless pair.

Excellent audio performance with rich bass depth and detailed highs; Comprehensive; intuitive; and customizable on-ear controls; App features adjustable EQ; Secure fit

Pricey; Not ideal for gym use

The Sennheiser CX 400BT True Wireless earphones are many things but it’s no question they follow one of the German audio company’s hard-to-remember naming conventions.

Sennheiser’s first true wireless headphones outside the Momentum range offer the same superb sound quality without such a steep price tag

Superb sound quality; Stable connection; Quick, seamless pairing;

No splash proofing; No ANC; Not cheap;

Sennheiser’s first true wireless headphones outside the Momentum range offer the same superb sound quality without such a steep price tag

Superb sound quality; Stable connection; Quick, seamless pairing;

No splash proofing; No ANC; Not cheap;

The Sennheiser CX400 BT wireless earbuds are an ideal pick for audiophiles who don’t want to go beyond the £200 mark. The quality sound and basic design provide a delightful, no fuss audio experience. However, there’s more features and better battery life to be had among some competitors.

The first pair of standalone earbuds I bought was the Sennheiser CX 400-II . It was 2009 and at the time, it seemed preposterous to spend money on an accessory that was bundled for free with every phone or iPod.

Sound These are the best-sounding true wireless buds I've tried; Controls They're customizable in the app, and give neat feedback through different tones for double and triple taps; App You can customize the equalizer and easily switch your buds' connection between multiple phones and computers.

No independence The right earbud is the master. You can't use the left one alone as only the right one works in mono mode; Missing features Besides the lack of ANC, these don't have proximity sensors, a transparency mode, wireless charging, or an IP rating of any kind.

The Sennheiser CX 400BT is a really solid mid-range set of TWS earphones, but bargain hunters may want to find something else if ANC is important to them. Still, having high-end audio hardware at a mid-range price point is a good bargain in our opinion.

Sound quality; In-app equalizer; Small case; USB-C charging; AAC and aptX support

Cost; No ANC; Large earbuds

If you’re one of those people who enjoy listening to music while on the go, don’t worry, you’re not alone. Music soothes and keeps us going during hectic days, so you’d want a pair of earbuds that produce superior sounds.

We have already illustrated that the Sennheiser CX 400BT has tough competition. Straight up on the spec sheet, it misses active noise cancellation. You may feel it’s a big miss, but really, it isn’t. If you’d really want ANC still, the Sony WF-1000XM3 are yours to pick then.